Aib-stjpplying device fob



Nov. 22, 1927.

G. A. HUETTEMAN ET AL AIR SUPPLYING DEVICE FOR GAS BURNERS Filed March 7, 1927 Patented Nov. 22, 1927.

UNITED STATES PATENT OFFICE,

GUSTAV A. HUETTEMAN AND FREDERICK A. GEBCICH, 0F OAKLAND, CALIFORNIA,

ASSIGNORS TO HAMMER-EBAY COMPANY, OF OAKLAND, CALIFORNIA, A COR- PORATION OF CALIFORNIA.

AIR-SUPPLYING DEVICE FOR GAS BURNER/S.

Application filed March 7,1927. Serial No. 173,241..

Our invention relates to a device for effecting the delivery of a supply of fresh air to the flame of a gas burner positioned beneath a closed cooking-top.

The various gas burners associated with closed cooking tops are usually disposed in a common combustion chamber having an air inlet lower than the outlet therefrom, whereby the escape of the heated and vitiated air from the burners sets up a convection stream through the upper part of the chamber to insure a flow of fresh air thereinto, But it has been found, in practice, that if the vitiated air' from burners first reached by the incoming air stream is allowed to flow around other burners in the combustion chambers, the necessary amount of oxygen for completing combustion at the latter burners is lacking, and it has therefore been found desirable to provide for the independent supply of fresh air to each of the burners. Since the flow of vitiated air in the combustion chamber is chiefly between the burners and cooking top, this fact has heretofore been taken advantage of by surrounding the burners with verticallydis posed generally tubular members whereby fresh air from beneath the burner level may be directed upwardly around the burner and the vitiated air from other burners will at the same time be deflected over and around the burner. But devices of this class,'as heretofore made, have proved unsatisfactory, chiefly in that the burner itself has so interfered with the unrestricted flow of air therethrough that only a limited portion of such air has been directed against the flame of the jets whereby the desired result of the use of such devices has been minimized and it is, accordingly, a general ob:

removable attachment for burners of standard types.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of the invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood, however, that variations in the showing made by the said drawings and description may be adopted within the scope of the invention as set forth in the claims.

Referrin to said drawings:

Figure '1 1s a fragmentary plan 'view showing a preferred embodiment of the device in operatively disposed relation to thetop and a gas burner of a stove.

Figure 2' is a sectional view taken as on the broken line 22 in Figure 1.

Figure 3 is a fragmentary developed view taken on the line 3-3 in Figure 1.

Figures 4 and 5 are views similar to Figure 2 showin modified forms of the device of our invention. 7

As herewith particularly illustrated, the

deviceof our invention is operatively associated with a gas burner 6 suitably supported beneath a cooking-top plate 7. The burner 6, it will be noted, is of a general star form and comprises a hollow body having an inner annular portion 9 of generally circular section from which extend radially disposed like pointsv or arms 11, such arms being of substantially uniform width when viewed in plan. When viewed from an end, the upper portions of the arms 11 present in general outline an isosceles trapezoid with its larger base lowermost, whereby inwardly sloping faces 12 are defined at the upper sides of the arms, said faces terminating at upper, or jet faces 13 of the arms. Preferably, and as here shown, the jet faces 13 of the various arms 11 are disposed in a common plane slightly above the top of the body portion 9 and extend inwardly thereacross to the central opening of the body portion whereby top'surface portions 14 of the body portion '9 are .defined between the jet faces 13 in depressed relation with respect to the latter. Perforations 15 are provided in the arm faces 13, such, perforations extending into the burner cavity and serving to provide jet nozzles for directing the gaseous fuel up wardly of the faces 13-prefe'rably, and as here shown, the nozzle perforations of each arm 11 are aligned longitudinally 'of their arm. The top plate 7, it will now be noted, is provided with a lid opening 16 in which a lid 17 is arranged to be removably disposed and beneath which the burner 6 18 arranged to be supported in required spaced relation by means of a rod member 18 on which the lower face- 19 of the burner 18 arranged to adj ustably seat.

Disposed generally over and around the burner is a conduit member 21, such member comprising a shell portion 22 of generally frustro-conical outline and having the plane of its larger end disposed ad acent and parallel to the plane defined by the lower,

edges of the side faces 12 of the arms. The shell portion 22, it will be noted, 13 radially spaced from the burner arms,'1s open at the bottom thereof, and is here shown notched from below to permit the passage of the burner supply pipe 23 thereunder. Extending inwardly from the top edge of the shell 22 is a series of triangular projections 24L corresponding in number to the number of burner arms .11, the edges of adjacent projections being parallel whereby radially directed elongated areas 26 terminating at their inner ends in a common central circular area are defined. ,Depending from the projections 24 and extending between such projections and the shell 22 are webs 28, such webs terminating adjacent the bottom edge of theshell and having a bottom edge portion 29 sloping gene-rally upwardly from the shell. Preferably, the webs 28 are generally Wedge-shaped when viewed radiallyywith their points at the bottom edge portions 29 thereof. As here shown, each web edge portion 29 is coterminous at a point 31 with a,

web edge portion 32, which latter edge of the web extends substantially vertically downwardly from the extremity of its .pro

jection 24.

Preferably, and as here shown, the shell 22, projections 24, and webs 28 are integrally associated, itbeingnoted that the structure provided is adapted to bereadily cast as a single unit. Furthermore, prismoidal depressions 25'are'preferably provided in the projections 24 having the lines of theirvertices generally parallel to the web edges 29'-in this manner, the passage of air over the outside of the member 21 is facilitated and the weight of the structure is reduced.

. It will now be noted that when the member 21 is operatively mounted over the burner, the areas 26 are arranged to be dis posed drectly over the burner arms 11 and that the web points 31 are disposedbetwee'h the burner arms. In this manner, obliquely web faces 34; and the opposed burner faces 12 whereby the air moving upwardly through the passages defined between the burner arms and member 21 will be directed obliquely into the combustion area above the nozzles so that the flame jets of the rows thereof will be provided with an air supply which is positively projected thereagainst from both sides of the rows. In this mannor, the member 21 is arranged to function as a conduit to direct a maximum supply of fresh air from below the burnerto all of the burner jets, it being noted that the generally similar devices heretofore used have usually'directed the fresh air supply along the flame rather than into it, as is effected by the present device. It will be noted that the member 21 is preferably so proportioned that the plane of the top surface thereof will to the burnervand as here-shown, such means comprises the provision of hanger arms 36 whereby it may be supported from the top plate 7. Preferably, the arms 36 are formed integral with the conduit 21 andextend up wardly therefrom for removable engagement with the plate. 'As here shown, the flange 37 which provides the seat 38 for the. lid 17 is,

utilizedfor effecting the support of the'condant 21, such seat being provided with depressed sockets 39 therealongin'which radially outwardly directed extensions 41 provided on theupper ends of the arms 36 are arranged to seat in such manner as not to interfere with the seating of the lid 17.

' Means are provided for removably supporting a grate 42, in the lid opening, and as here shown, such means comprises the provision of notches 42 on the inner sides of the 1 arms 36 adjacent their upper'ends whereby a seat ls'provided for the removable mountmg of the grate in the lid opening below, and independently of, the lid.

It Will now be noted that when the conduit member 21 is mounted on the plate 7 in the manner described, the webs 28 are arranged to be disposed between the burner arms 11 but preferably do not contact therewith. In this manner, the member 21 serves as a centermg guide for the burner, which .burner 1s preferably slidably and adjustably seated on the rod member 18 to permit such centering.

h The embodiment of the conduit disclosed 1n Figure 4, it will be noted, is arranged to be carried by the burner 46. As particular- 1y disclosed, the conduit member!!! is provided with projections 48 corresponding to the projections 24 of the previously tie-- scribed embodiment. Depending from the inner ends of certain of the projections 48 are feet 49 which are arranged to seat on the central burner portions 51 between the jet arms 52 of the burner whereby the member 47 may be supported on the burner without interfering with the functioning thereof. In this manner, the use of the device avoids the necessity of a special structure for the top plate, it being noted that the member 47 is so formed as to function to direct the fresh air to the jets in the same manner as does the member 21 hereinbefore described.

In the embodiment of Figure 5, the conduit member 54 is generally formd as is the member 21 of the first described embodiment and is also arranged to provide the support for the burner 55. Formed in the under side of a burner arm 53 of the burner 55 is a depression or socket 56, such arm being aligned with the burner supply pipe (not shown), while extending downwardly and generally inwardly from the member 54 1s an arm 57 providing a bearing point 58 for engagement in the socket 56. In this manner, the member 54 provides the sole suport for the burner within the combustion chamber of the stove, so that the need for special burner supporting rods is eliminated.

\Ve claim: I

1. In combination with a gas burner dis posed beneath a closed cooking-top plate and providing gas-jet nozzles, a conduit member sifbstantially enclosing said burner and arranged to direct air flowing upwardly therethrough obliquely into the combustion portions of the jets directed from sald nozzles.

2. In combination with a gas burner disposed beneath a closed cooking top plate and providing gas-jet nozzles, a conduit member substantially enclosing said burner in spaced relation therefrom and arranged to direct air flowing between said member and burner obliquely into the jets directed from'sald nozzles from opposed sides thereof.

3. In combination with a gas burner disposed beneath a closed cooking-top plate and providing gas-jet nozzles, a conduit member substantially enclosing said burner in spaced relation therefrom and defining therewith obliquely directed air channels whereby air flowing therethrough will be directed obliquely into the jets directed from said nozzles.

4. In combination with a as burner disposed beneath a closed coo ing-top plate and providing a row of gas-jet nozzles, a conduit member substantially enclosing said burner in spaced relation therefrom and defining at opposite sides of said row of nozzles obliquely directed air channels arranged to direct air flowing upwardly therethrough against the jets of said row of nozzles from opposite sides thereof.

5. In combination with a gas burner disposed beneath a closed cooking-top plate and providing gas-jet nozzles, a conduit member substantially enclosing said burner in spaced relation therefrom and arranged to direct air flowing upwardly therethrough obliquely into the jets from said nozzles, and means supporting said conduit in operative relation to said burner independently of said burner.

6. In a gas stove, a cooking-top plate providing a lid opening, a lid for said opening, means on said plate providing a seat for said lid, a gas burner mounted below said opening and providing gas-jet nozzles, a conduit member substantially enclosing said burner in spaced relation therefrom and arranged to direct air flowing upwardly therethrough obliquely into the jets from said nozzles, and means on said member operative to effect the support thereof from said seat.

In testimony whereof, we have hereunto set our hands at Oakland, California, this 26th day of February, 1927.

GUSTAV A. HUETTEMAN. FREDERICK A. GERCICH. 

